#!/usr/bin/env bash
################################################################################
# Test objective: check if a zero-copy monitor is correctly blocked until the
#                 monitored netmap pipe reads the frame.
# Operations:
# 1) create a pair of netmap pipes (pipe{1, pipe}1).
# 2) open a zero-copy monitor pipe{1/z for pipe{1.
# 3) send from pipe}1 without receiving from pipe{1, check that pipe{1/z doesn't
#    receive the frame.
# 4) receive from pipe{1, check that pipe{1/z receives the frame.
################################################################################
source test_lib

parse_send_recv_arguments "$@"
verbosity="${verbosity:-}"
fill="${fill:-d}"
len="${len:-150}"
num="${num:-1}"
seq="${seq:-}"

# Pre-opening interface that will be needed. This is needed to avoid a race
# condition between the sending and receiving ports.
functional $verbosity -i "netmap:pipe{1"
check_success $? "pre-open netmap:pipe{1"
functional $verbosity -i "netmap:pipe{1/z"
check_success $? "pre-open netmap:pipe{1/z"
functional $verbosity -i "netmap:pipe}1"
check_success $? "pre-open netmap:pipe}1"

# Initially we don't receive with the monitored pipe pipe{1, therefore the
# monitor should not receive the frame.
functional $verbosity -i "netmap:pipe{1/z" -r "${len}:${fill}:${num}" $seq -n &
p1=$!
functional $verbosity -i "netmap:pipe}1"   -t "${len}:${fill}:${num}" $seq
e2=$?
wait $p1
e1=$?
check_success $e1 "no-receive-${num} netmap:pipe{1"
check_success $e2 "send-${num} netmap:pipe{1"

# Now we receive with the monitored pipe pipe{1, therefore the monitor should
# receive the frame.
functional $verbosity -i "netmap:pipe{1"   -r "${len}:${fill}:${num}" $seq &
p3=$!
functional $verbosity -i "netmap:pipe{1/z" -r "${len}:${fill}:${num}" $seq
e4=$?
wait $p3
e3=$?
check_success $e3 "receive-${num} netmap:pipe{1"
check_success $e4 "receive-${num} netmap:pipe{1/z"
